Method for the preparation of carbonates by a continuous process

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbonate esters

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558271, 558272, 558273, C07C 6800

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active

060342625

ABSTRACT:
A continuous flow process for converting hydroxyaromatic compounds to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst system typically comprising a group VIIIB metal or compound thereof, an inorganic co-catalyst, an organic co-catalyst and a hexaalkylguanidinium bromide or chloride, preferably bromide, wherein at least two components of the catalyst system, preferably lead oxide and hexaalkylguanidinium bromide, are introduced separately into the reactor.

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